Chris, paint removal by a do-it-yourselfer is most easily accomplished with a pressure washer. Although pressure washers are available for rent, if you are a homeowner we suggest you seriously consider purchasing one. The uses around the house are endless. Be careful! If you aren't careful you can damage the siding below. Pressure washing takes patience, attention to the matter at hand and a careful touch. Once you have finished pressure washing you may want to touch things up with a paint scraper. Also, sand those areas where the pressure washer lifted the wood grain. Finally, use sandpaper to feather in all of the edges between the remaining paint and any bare wood. Next, apply a coat of high quality, oil-base primer and then your finish coat. We suggest high quality acrylic latex. And, good luck!